US807342A - Harrow. - Google Patents

Description

No. 807,842. PATENTED DEC. 12, 1905. W. M. WILLMORE- & W. L. SCHMIDT.

HARROW.

APPLICATION FILED AUG. 22. 1905.

I I William/M.

mzzmom akfozwu iamliouisSchmz'dt WILLIAM M. WILLMORE AND UNITED STATES PATENT OFFICE.

HARROW.

Specification of Letters Patent.

Patented Dec. 12, 1905.

Application filed August 22, 1905. Serial No. 275,263-

To all whom it may concern:

Be it known that we, WILLIAM M. WILL- MORE and WILLIAM LoUIs SCHMIDT, citizens of the United States, residing at Vincennes, in the county of Knox and State of Indiana, have invented new and useful Improvements in Harrows, of which the following is a specification.

This invention relates to harrows of the type having rotary tooth-carrying bars, and has for its objects to produce a comparatively simple inexpensive device of this character in which the bars are securely and pivotally engaged with the frame, one in which the pivoting members may be readily disengaged for releasing the bars when circumstances require, and one wherein said pivoting members will be locked against accidental disengagement by the adjacent teeth-holding wedges.

A further object of the invention is to provide a simplified means for securing the teeth in position upon and for movement with the bars, one wherein the teeth-holding wedges may be readily manipulated for securing or releasing the teeth, and one in which accidental disengagement and loss of the wedges is obviated.

With these and other objects in view the invention comprises the novel features of construction and combination of parts more fully hereinafter described.

In the accompanying drawings, Figure 1 is a top plan view of a harrow embodying the invention. Fig. 2 is a side elevation of the same.

1 Fig. 3 is an enlarged detail view of a portion of the frame and one of the terminal teeth. Fig. 4 is a top plan view of the same. Fig. 5 is a detail rear elevation of the parts shown in Fig. 4 as viewed in the direction ofthe arrow in said figure. Fig. 6 is an enlarged Side elevation, partly in section, of one of the intermediate teeth, the section being taken on the line 6 6 of Fig. 1-. Fig. 7 is a plan view of one of the teeth-holding clips. -Fig. 8 is an elevation of oneof the tooth-locking members or wedges. Fig. 9 is an elevation of one of the bar-pivoting members.

Referring to the drawings, 1 designates the side bars of the harrow, to which are pivoted for rotation a plurality of tooth-carrying bars 2, equipped with teeth 3 and provided with fixed upwardly-projecting crank-arms 4, connected at their upper ends with a rigid element or rod 5 in turn engaged at its forward end with a pivoted operating-lever 6 operable for rotating the tooth-bars 2 for varying the inclination of the teeth 3, these parts, except as hereinafter explained, being all of the usual or any appropriate construction and material and adapted to perform their ordinary functions.

The teeth 3 are in accordance with the present invention connected to the U-shaped bars 2, each by means of a U-shaped connecting member or clip 7 and a retaining member or wedge 8, which latter, together with the tooth, is entered through suitablyshaped openings or slots 9, provided in the clip, said wedge, which has in one of its faces a longitudinal groove or seat 10 designed to receive the adjacent edge of the tooth, being provided in its opposite edge with a pair of relatively spaced recesses 11 and with spaced bearing portions or faces 12, adapted in operation to engage the adjacent edges of the bar 2, while at the terminals of the wedge there are formed horizontally-projecting engaging portions or ears 13, which facilitate the operation of driving the wedge, it being noted in this connection that the bearing portions 12 of the latter are suitably inclined to insure the proper Wedging action for securely retaining the tooth in place. In assembling the parts the clip 7 is positioned upon the bar 2 at an appropriate point and thewedge 8 entered into the slots 9 with the recesses 11 opposite the edges of the bar, the tooth 3 being next entered into the slots and the wedge driven home for securing the tooth against movement. It is to be observed in this connection that the portions or ears 13 not only present extended surfaces to sustain the blows of a hammer While driving the wedges, but also serve in the event of the tooth and wedge becoming loosened to engage with the clip 7 and obviate escape and loss of the wedge. Further, it will be noted that when the wedge is driven up or loosened for. turning the tooth or for other purposes the recesses 11 engage the edges of bar 2, thus causing the tooth to become thoroughly loose in the clip, which permits ready removal of the tooth from the clip and obviates the common necessity of driving the tooth out with a hammer or like tool and consequent battering and damaging the point of the tooth.

The bars 2 are connected with the side bars 1 by means of pivoting members or bolts 14, each comprising a cylindrical body portion having at one end a bearing-head 15, and at its other end with an engaging portion or head 16,-having a front inclined or beveled face 17 and a rear bearingportion or face 18, the body of the member 14 being provided at a point in rear of the head 16 and opposite the bearing-face 18 with a recess 19, which, in conjunction with the beveled face 17, facilitates entrance of the head 16 through the bearingopening in the bar 1.

In practice the pivoting members 14 are entered through suitable bearing-openings in the side bars 1 and seated in the channels of the bars 2, to which latter they are looked through engagement of the wedges 8 of the terminal teeth 3 with the bearing-faces 18 of the heads 16, it being obvious that the heads 15 will hear at the outer faces of the side bars 1 and that the cylindrical body portions of the members 14 are free for rotation in the latter to permit rotation of the tooth-carrying bars 2. In assembling the parts the bars 2 are positioned with the pivoting members 14 in place, after which the terminal clips 7 are applied to the tooth-bars and the terminal teeth 3 and wedges 8 entered through the slots 9, whereupon when the wedges are driven home they subserve the twofold function of fixing the teeth and locking the pivoting members to the bars.

From the foregoing it is apparent that we produce a comparatively simple inexpensive device of the character described admirably adapted for the attainment of the ends in view, it being understood that minor changes in the details herein set forth may be resorted to without departing from thespirit of the invention.

Having thus described our-invention, what we claim is 1. In a harrow, a tooth-carrying bar, a clip positioned thereon and provided with openings, a tooth entered through the openings in the clip, and a wedge entered through said openings for retaining the tooth in place, said wedge being provided with terminal-engaging portions and having its bar-engaging face recessed at spaced intervals.

2. In a harrow, a tooth-carrying bar of substantially U shape in cross-section, a clip positioned on the bar and provided with toothreceiving openings, a tooth entered through said openings, and a tooth-retaining wedge also entered in the openings for fixing the tooth in place, said wedge beingadapted to bear upon the spaced edges of the bar and having its bearing-faces provided with a pair of recesses designed to register with said edges.

3. In aharrow, a toothcarrying bar, a clip positioned on the latter and provided with tooth-receiving openings, a tooth entered in said openings and a tooth-retaining wedge also entered through the openings and designed to bear upon one face of the bar for fixing the tooth in place, said wedge being provided with projecting portions disposed at opposite sides of the clip.

4. In a harrow, a frame-bar, a tooth-carrying ba-r having a recess, a pivoting member entered through the frame-bar and seated in the recess, said member having a head presenting a bearing-face, a clip disposed upon the bar and having tooth-receiving openings, a tooth entered through said openings, and a wedge enteredthrough the clip for fixing the tooth in place, said wedge being designedfor engagement with the bearing-face to lock the being adapted for interlocking engagement with the pivoting member to lock the latter to the bar.

6. In a harrow, aframe-bar, a tooth-carrying bar, a pivoting member for said tooth-bar, one of the parts having a recess to receive the other and the other being provided with a bearing-face, aclip positioned on the bar and having tooth-receiving opening, a tooth entered through said opening, and a retaining member for fixing the tooth in place, said retaining member being designed for interlocking engagement with the bearing-face to lock the pivoting member to the tooth-bar.

In testimony whereof we afiix our signatures in presence of two witnesses.

WILLIAM M. WILLMORE. WILLIAM LOUIS SCHMIDT.

Witnesses:

LOUIS (J. KIRGHHOFF, WALTER R, FOWLER.

Images